package com.sjb.singleequipment.util;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author:sjb
 * @Description: 网络工具类
 */
public class NetUtils {

    /**
     * 获取客户端的IP地址
     *
     * @param request HttpServletRequest对象
     * @return 客户端IP地址
     */
    public static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.isEmpty() || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        // 如果是通过多个代理的情况，第一个IP为客户端真实IP
        if (ip != null && ip.contains(",")) {
            ip = ip.split(",")[0];
        }
        return ip;
    }
}
